Natural language letter based visual cryptography scheme

Hsiao Ching Lin, Ching Nung Yang, Chi Sung Laih, Hui Tang Lin

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Naor and Shamir proposed the notion of a (k,n) visual cryptography scheme (VCS), which allows k or more stacked transparent share images to reveal a secret image. It can be used without prerequisite knowledge of cryptography or complex computations. In these schemes, no information about the secret can be obtained from fewer than k shares. Previous VCSs use black and white subpixels to create share images. In this paper, we present a letter-based VCS (LVCS) where pixels are replaced by letters for the share images. Shares can now be constructed using meaningful data as subterfuge all while carrying secret data in plain sight, and an adversary will not recognize them as containing secrets. We prove that the proposed (k,n)-LVCS satisfies contrast and security conditions and secret information may be reconstructed by any k shares but with less than k shares reveal nothing.

Original languageEnglish
Pages (from-to)318-331
Number of pages14
JournalJournal of Visual Communication and Image Representation
Issue number3
Publication statusPublished - 2013 Feb 8

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Media Technology
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering


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